Valve for internal-combustion engines.



P. G. KREITZ.

VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEB.2,1911.

1,052,@O5 l atented; Feb. 4, 1913.

5- 1 Raina 1171x57- ZNR/KNTOH; g 772 PHILLIP GEREIT PHILLIP C. KBEITZ, 0F CLEVELAND, OHIO.

VALVE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Feb. 4,1913.

Application filed February 2, 1911. Serial No. 606,084.

T 0 all whom it may concern.-

Be it known that I, PHILLIPC. KRnITz, a

citizen of the United States, residing at Cleveland, in the county 0 Cuyahoga and itheirhardness and other wearing qualities,

Ohio, have invented certain new State 0 and use 111 Improvements m Valves for Internal- (fiimbustion Engines, of which the following. is a specification.

nal combustion engines and the invention conslsts of a valve constructed of diflerent metals and parts and adapted to meet the: conditions of service in a better and more durable way than heretofore, all substantially as shown and described and particularly pointed out -in the claims.

is a cross section of the valve according to one manner of constructing the same, and Fig. 2 is a cross-section thereof according to another manner of construction. Fig. 3 1s a perspective detail of the steel disk, and Fig,

4 1s a perspective view: of the valve stem as shown in Fig 1 Fig. 5 is a perspective dc: tail ofthe cast metal head;

The valve as thus shown and described is designed to be usedmore especially in internal combustion engines wherein the wear and'tear upon valves by incessant ounding and incidental strain is exceedingy severe and for which reason the life of an ordinary valve is shortand its frequent replacing becomes expensive and troublesome. These conditions and experiences being well known there have been many and varied experiments to overcome the same and supply a durable and comparatively cheap construction of .valve. My resent invention has these latter objects 1n view and the valve shown has proved by re eated and protracted tests under ordinary ard conditions capable of meeting the requirements. To this end the said valve is preferably made with three original parts or pieces of different metals which are chosen according to the service they are toperform and endure in actual work, and particularly is this true of the head or body B of the valve. As these valves, or valves for this use, are ordinarily constructed they are substantially flat on top and have beveled or tapered ed s 2, adapted to occupy seats 4 correspondingly tapered, and so faras I know and believe the entire valve or valve body has always heretofore been cast or made in one piece.

sented by 6.

As to this, there have been different metals tried for this purpose and some have given better satisfaction than others according to but the place is a hard one and the test for endurance severe under the most favorable conditions, so that it cannot be said that fany one single metal valve has withstood My invention relates to valves for mterthe work satisfactorily. Now,- I have conceived the construction of the valve herein to meet these conditions and which has a cast iron body with the usual tapered or beveled and ground edge 2 formed over a comparativel thin rim 5 of substantially uniform thic ness its full depth and hav- I 3 ing its inner-side flaring corresponding to In the accompanying drawings, Figure l 5 the outer side'2. This produces a substantially saucer shaped top to the said .body B and the saucer space within said rim 5 is filled or occupied by a close fitting steel disk D. Two ways of securing the said .also the said disk is brazed in said head and "on said stem so that the three parts are uni.-

fied and made as one. The brazing is repre- This in a sense produces a composite valve, with comparatively soft wearing metal in its Seating portion and'a hard and firm backing D in sustaining relation to the bearing rim 5, while the stem S is still another part of a different metal carrying said head and disk. In operation with valves of this general character or located as this valve is designed to be the valve is opened by a cam and. closed by a spring, not shown, the whole making the severe operation above referred to. I have met these conditions with my valve by making the actual seating portion B of a comparatively soft'metal which will, however, endure the wear and tear in so far as seating is concerned, and by reason of the steel reinforcement whichis incorporated therewith gives the said seating portion the practical value of steel in strength and durability. Generally an all. cast iron valve is liable to be split at the weakest oint across the edge and to be disabled in t is way, but the steel backing by disk D prevents such cross splitting and gives the valve an indefinitely prolonged life which an all cast iron valve does not possess. if, for any possible reason, the two metals in Fig. 1 should separate the screw connection or stem S will hold them together but my plan and purpose are to so perfectly amalgamate said metals as to make them one. Two holes 71. are shown in the top of disk D which, among other things, serve to insert an instrument to rotate said disk on standard S into threaded engagement therewith, as seen in Fig. 1. i

It will be particularly noted that disk D is of a diameter great enoughto permit its beveled edge to overlap the base of the inclined or taperin seat portion of flange 5- the point of brea age generally. T his reinforcement produces a strong and unbreakable construction, and has the further advantage of lessening the weight of the valve as compared with an all cast iron valve, thereb lessening the pounding actions on the valve and seat. Furthermore, the use of a cast iron body eliminates pitting and burning thereof by carbon deposits and consequent destruction of a perfect seat,a

fault often observed in steel and nickel-steel valves.

roaaooa What it claim is;

1. A valve consisting of a cast iron head with a flange of substantially uniforni thickness in inclined relation about the top thereof and providin a recess within its borders, a steel disk fitting said recess and brazed to said head, and a valve stem of siteil engaged through both said head and 2. A beveled valve consisting of an iron head of substantially saucer shape at its top, a separate disk of wrought metal laid into the to of said head to extend over its beveled e ge, said head and disk being brazed together, and a stem having a brazed union with both said head and disk.

3. A valve consisting of a head of soft iron having a beveled edge and provided with a separate stem of wrought metal brazed thereto at its center, and a separate wrought-metal disk secured to said stem at the top of said head to reinforce the said iron head at its beveled edge.

In testimony whereof I aiiix my signature in presence of two witnesses.

PHILLIP C. KREITZ.

WVitnesses:

E. M. FISHER, R. Bali/loses. 

